Secondary battery assembly

A technology for secondary batteries and components, applied in the direction of secondary batteries, battery pack components, secondary battery manufacturing, etc. The effect of uniform surface pressure

Inactive Publication Date: 2014-08-27
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In such a secondary battery, it is known that gas is generated inside by repeated charging and discharging, causing changes in internal pressure, deformation of the outer case, etc.
If this happens, the deterioration of the secondary battery is significantly increased, so it is not preferable

Method used

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Embodiment Construction

[0035] Hereinafter, the best mode embodying the present invention will be described in detail with reference to the drawings. In this embodiment, the present invention is applied to a battery pack in which a plurality of lithium ion secondary batteries are stacked and connected to each other.

[0036] Such as figure 1 As shown, the battery pack 1 of this embodiment has a plurality of single cells 11 , a plurality of contact members 12 , and two restraint members 13 . Cells 11 and contact members 12 are stacked alternately, and constraining members 13 are arranged on both sides of the whole. Both ends of the restraining band 14 are respectively fixed to the restraining members 13 on both sides, whereby the restraining members 13 are mutually restrained. Thus, the restraint member 13 presses the plurality of cells 11 and the like located therebetween from both sides. In this embodiment, the battery pack 1 corresponds to a secondary battery pack.

[0037] Such as figure 2 A...

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Abstract

A secondary battery assembly includes: a secondary battery including a wound electrode body enclosed in a flat rectangular case; a contact member partly contacting a side surface as a pressed surface having a maximum area of outer surfaces of the secondary battery; and a binding member for binding the secondary battery and the contact member to partly press against the pressed surface. The contact member includes: contact parts arranged discretely in contact with the pressed surface; and a connecting part connecting the contact parts. The contact parts are formed to protrude from the connecting part toward the pressed surface, and into an arrangement or a shape to press more weakly both one-side regions of the pressed surface in a winding axis direction and more strongly a central region between the one-side regions.

Description

technical field [0001] The present invention relates to a secondary battery assembly having a secondary battery formed by enclosing a roll-shaped electrode body in a flat and square case. More specifically, it relates to a secondary battery module that restrains the secondary batteries in a state where the side surfaces with the largest area (hereinafter referred to as pressed surfaces) among the outer surfaces of the secondary batteries are locally pressed. Background technique [0002] There is a secondary battery formed by winding or laminating positive and negative electrode plates with a separator interposed therebetween, and enclosing them in an outer case together with an electrolytic solution. In such a secondary battery, it is known that gas is generated inside by repeated charge and discharge, causing changes in internal pressure, deformation of the outer case, and the like. If this happens, the deterioration of the secondary battery will remarkably increase, whic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/10H01M50/103H01M50/209H01M50/264H01M50/291
CPCH01M10/5032H01M10/0431H01M10/5004H01M10/0481H01M10/5016H01M10/5063H01M2/1077H01M2/1072H01M6/46H01M2220/20H01M10/5059H01M2/0237H01M50/291H01M50/209H01M50/103H01M50/264H01M10/625H01M10/647H01M10/6557H01M10/6561H01M10/613Y02E60/10Y02P70/50
Inventor 小幡裕之
Owner TOYOTA JIDOSHA KK
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